Preliminary shielding analysis in support of the CSNS target station shutter neutron beam stop design

ZHANG Bin; CHEN Yi-Xue; WANG Wei-Jin; YANG Shou-Hai; WU Jun; YIN Wen; LIANG Tian-Jiao; JIA Xue-Jun

doi:10.1088/1674-1137/35/8/017

Chinese Physics C> 2011, Vol. 35> Issue(8) : 791-795 DOI: 10.1088/1674-1137/35/8/017

Preliminary shielding analysis in support of the CSNS target station shutter neutron beam stop design

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Abstract：
The construction of China Spallation Neutron Source (CSNS) has been initiated in Dongguan, Guangdong, China. Thus a detailed radiation transport analysis of the shutter neutron beam stop is of vital importance. The analyses are performed using the coupled Monte Carlo and multi-dimensional discrete ordinates method. The target of calculations is to optimize the neutron beamline shielding design to guarantee personal safety and minimize cost. Successful elimination of the primary ray effects via the two-dimensional uncollided flux and the first collision source methodology is also illustrated. Two-dimensional dose distribution is calculated. The dose at the end of the neutron beam line is less than 2.5 μSv/h. The models have ensured that the doses received by the hall staff members are below the standard limit required.

References

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FANG S X, FU S N, QIN Q et al. Journal of the Korean Physical Society, 2006, 48(4): 697-7022 WEI J, CHEN H S, CHEN Y W et al. Nuclear Instruments and Methods in Physics Research A, 2009, 600: 10-133 Miller T M. Oak Ridge National Laboratory, 2001, 106100200-DA0001-R004 Nakaoa N, Nunomiya T, Iwase H et al. Nuclear Instruments and Methods in Physics Research A, 2004, 530: 379-3905 Gallmeier F X, Ferguson P D, Iverson E B et al. Nuclear Instruments and Methods in Physics Research A, 2006, 562: 946-9496 Hughs H G, Prael R E, Little R C. Los Alamos National Laboratory, 19977 Childs R L. Oak Ridge National Laboratory, 1996, CCC6501DOORS3.28 Childs R L, PACE J V. Oak Ridge National Laboratory, USA, 19929 RhoadesW A, Childs R L. Oak Ridge National Laboratory, 1992, ORNL/TM-1177810 MacFarlane R E, Muir D W. Los Alamos National Laboratory, 1994, Tech. Rep. LA-12740-M11 WU J, CHEN Y X, ZHANG B et al. High Energy Multigroup Library HEST1.0 Based on ENDF/B-4: Development, Veri cation and Application to the CSNS Shielding Design. Chin. Phys. C (HEP NP) to be published12 YIN W, YU Q Z, LIANG T J, YAN Q W. ICANS-720, 2007. 416

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ZHANG Bin, CHEN Yi-Xue, WANG Wei-Jin, YANG Shou-Hai, WU Jun, YIN Wen, LIANG Tian-Jiao and JIA Xue-Jun. Preliminary shielding analysis in support of the CSNS target station shutter neutron beam stop design[J]. Chinese Physics C, 2011, 35(8): 791-795. doi: 10.1088/1674-1137/35/8/017

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Received: 2010-10-08
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Preliminary shielding analysis in support of the CSNS target station shutter neutron beam stop design

Received Date: 2010-10-08
Accepted Date: 1900-01-01
Available Online: 2011-08-05

Abstract: The construction of China Spallation Neutron Source (CSNS) has been initiated in Dongguan, Guangdong, China. Thus a detailed radiation transport analysis of the shutter neutron beam stop is of vital importance. The analyses are performed using the coupled Monte Carlo and multi-dimensional discrete ordinates method. The target of calculations is to optimize the neutron beamline shielding design to guarantee personal safety and minimize cost. Successful elimination of the primary ray effects via the two-dimensional uncollided flux and the first collision source methodology is also illustrated. Two-dimensional dose distribution is calculated. The dose at the end of the neutron beam line is less than 2.5 μSv/h. The models have ensured that the doses received by the hall staff members are below the standard limit required.